A study from the National Library of Medicine shows that overweight dogs are more likely to engage in unwanted behaviors.  https://pmc.ncbi.nlm.nih.gov/articles/PMC5468744/

How to prevent dogs from getting overweight

1. Plenty of exercise 
2. Plenty of enrichment and mental stimulation. 
3. Monitor their food intake. 
4. No Snacking. 

Purchase "The Business of Dog Training" on Amazon

RESOURCES:
Podcast Website: http://puppytalkpodcast.com
Sponsor Website: http://www.topgundogtraining.com
Dale's books: https://www.amazon.com/author/dalebuchanan